From 4397a018473ae589be959ba93cb491cbd77fe789 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Thu, 8 Mar 2018 16:17:59 +0100 Subject: scsi: support NDOB (no data-out buffer) for WRITE SAME commands A NDOB bit set to one specifies that the disk shall not transfer data from the data-out buffer and shall process the command as if the data-out buffer contained user data set to all zeroes. Signed-off-by: Paolo Bonzini --- hw/scsi/scsi-disk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'hw/scsi/scsi-disk.c') diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c index c65c1ce56d..5b7a48f5a5 100644 --- a/hw/scsi/scsi-disk.c +++ b/hw/scsi/scsi-disk.c @@ -1807,7 +1807,7 @@ static void scsi_disk_emulate_write_same(SCSIDiskReq *r, uint8_t *inbuf) return; } - if (buffer_is_zero(inbuf, s->qdev.blocksize)) { + if ((req->cmd.buf[1] & 0x1) || buffer_is_zero(inbuf, s->qdev.blocksize)) { int flags = (req->cmd.buf[1] & 0x8) ? BDRV_REQ_MAY_UNMAP : 0; /* The request is used as the AIO opaque value, so add a ref. */ -- cgit 1.4.1